Why COBOL Developers Prefer Writing Tests in Java - Szymon Wałachowski, Bartosz Filipek

E56 - Why COBOL Developers Prefer Writing Tests in Java - Szymon Wałachowski, Bartosz Filipek

Published: June 4, 2026

Duration: 23:49

When no IBM tool fits, two engineers built their own testing layer

What happens when 40 years of custom decisions stack so high that even the standard testing tools from your own vendor stop working? With Bartosz Filipek and Szymon Wałachowski I talk about exactly that situation: a mainframe environment so deep in its own customization that the only way forward was to build one final bridge to the outside world. We dig into how they created a Java-based unit testing tool for COBOL developers, and what surprised me most is that COBOL programmers find it easier to write a...